See I think this is where the problem lies also, demographically and geographical. You said you grew up in Minnesota, New York and Oklahoma are as different as Texas and Atlanta. Even on a city or county level there's widely different micro-macro social ecological systems in place. While me walking down a busy street in Soho with a Caucasian female may create virtually no disquiet, I know there's places in Alabama where a group of white men might pay me a visit later that evening over it. For this reason not many white or black families are willing to take that risk in some places, which limits exposure and opportunities in interracial dating. These are cultural affects, influenced by nationality, ethnicity background, heritage.
Now, character traits are universal, a hoe is gonna be hoe whether she's from Beijing, Sydney, Cameroon or Kingston. Whether she's from the Early Bronze Age, or a millennial. Most of the time, black Americans come from a vastly different background than most white Americans. White people do hold different sexual values. So "Cindy" may sleep with "Marcus", but "Chad" may be into "cuckolding". He may not value his wife the way "Marcus" would. "Cindy" may have been raised in a strict household and get to college and be featured on "Girls Gone Wild". "Marcus" may have grew up in a black church and searching for someone to "bring home to mama". Just like black American women treat men differently than Afro-Caribbean women. There's different values. Caribbean women take pride in femininity, when black American women through generational influence view their sexuality and femininity through two different scopes. She will strip to pay for college, maintain a rotation of sugar daddies and Instagram tricks, then push her Mercedes to a club with her girls and believe she's an accomplished "independent woman". Some authentic black American independent women will hold a PhD in Anthropology or American History and will look a black man right in his eye and tell him "You went to Howard? That's nice but I don't date thugs", and bop down the street with Williamsburg 37 year old skateboarding white guy that sells weed. Not saying this doesn't happen universally, but white women know their "worth", although it's convoluted she's less likely to EXCLUSIVELY be in a relationship with a black man, or sleep with him for money (see Backpage: NO BLACK MEN).
With that said, if a white woman understands the psychology of interracial dating and white privilege, regardless of her class and she cheats on a black man, she's in a different category than a run of the mill black American woman. Women are complicated, but if this woman can follow PR protocol through one illegitimate child, and marriage as I stated before she didn't care. She's making next level career moves Brennan couldn't even decode. She told the world "look into my eyes". It's about self-actualization for him, dudes like him and Charles Barkley see themselves as "exceptions" and unconditionally "accepted" opposed to "aware" and "respected" they don't see themselves as part of the autonomous black community. She knows what she was doing. And let's not pretend like my man wasn't out here doing his thing either. He just didn't know her game was more equipped than his, he wanted a trophy she knew deep down inside she couldn't be that, but she knew she wanted a boss. That's why he went public with it, to shame her for wanting a boss, because he's crying out for help in a reality him and Charles Barkley think is "real". She knew the deal, "I'll be YOUR white girl"...